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Comparative study on photocatalytic degradation of methylene blue using pristine ZnO and Ni/ZnO composite films

materials Today: Proceedings 2022年 66卷 3168-3173页

作者： Srisai, Jirawan Muangnapoh, Tanyakorn Vas-Umnuay, Paravee Center of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand National Science and Technology Development Agency Pathumthani Klong Luang 12120 Thailand

Industrial dye wastewater is rich in organic molecules that are harmful to all types of living organisms. The present work investigates the potential of the incorporation of Ni nanoparticles into ZnO films in order to enhance the photocatalytic degradation performance. Pristine ZnO has been widely used as a photocatalyst in a photocatalytic degradation treatment of wastewater, however can only be activated by UV light. Incorporation of Ni into ZnO can broaden the light spectrum by using both visible light and UV for the reaction, therefore enhancing the degradation efficiency. The experimental runs were performed to evaluate the effect of incorporation of Ni nanoparticles into ZnO films and morphology of Ni nanoparticles (rod-cubic-like and chain-like shapes) on the photocatalytic degradation efficiency. In this study, methylene blue was used as a model wastewater. The results revealed that addition of Ni enhanced the degradation efficiency to 44% (rod-cubic-like) and 40% (chain-like), compared to that of pristine ZnO of 33%. © 2022

关键词： Zinc oxide

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Investigation of detergent compositions on the effectiveness of alumina and aluminium titanium carbide cleaning

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materials Today: Proceedings 2022年 66卷 3185-3190页

作者： Pattaradamrongchai, Kittikron Prasittichai, Chaiya Chakthranont, Pongkarn Methaapanon, Rungthiwa Center of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University 254 Phayathai Road Pathumwan Bangkok 10330 Thailand Department of Chemistry Faculty of Science Kasetsart University Bangkok 10900 Thailand 111 Thailand Science Park Pathum Thani 12120 Thailand

particle contamination on a surface is a critical issue for the electronics manufacturing processes. Detergents that are composed of surfactants and appropriate additives can decrease the natural attraction forces between particles and surface, leading to effective particle removal. This work aims to investigate the influences of detergent pH and additives on the effectiveness in removing inorganic particles from Al2O3 and AlTiC substrates, which are commonly used materials in the electronics industry. In this study, we chose a model detergent comprised of an anionic surfactant, sodium dodecylbenzene sulfonate, and two additives, namely sodium acid pyrophosphate and ethanolamine. Talc particles were employed as a model inorganic contaminant. The effects of pH and ethanolamine concentration on the cleaning effectiveness of the model detergent were examined using optical microscopy and X-ray photoelectron spectroscopy (XPS). The stability of talc suspension in detergent solution, which is related to the possibility of particle recontamination, was determined by zeta potential. Our results indicate that the pH of the detergent directly affects its cleaning efficiency, likely by increasing the electrostatic repulsion between the surface and the talc particles. Similarly, the increasing ethanolamine concentration elevates the pH of the detergent, leading to better cleaning performances on both Al2O3 and AlTiC substrates. © 2022

关键词： Aluminum oxide

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Recent advances in functional utilisation of environmentally friendly and recyclable high-performance green biocomposites: A review

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Chinese Chemical Letters 2024年第4期35卷 73-85页

作者： Guiyang Zheng Xuelian Kang Haoran Ye Wei Fan Christian Sonne Su Shiung Lam Rock Keey Liew Changlei Xia Yang Shi Shengbo Ge Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China School of Textile Science and Engineering&Key Laboratory of Functional Textile Material and Product of Ministry of Education Xi'an Polytechnic UniversityXi'an 710048China Department of Bioscience Arctic Research Centre(ARC)Aarhus UniversityFrederiksborgvej 399PO Box 358DK-4000 RoskildeDenmark Sustainability Cluster School of EngineeringUniversity of Petroleum&Energy StudiesDehradunUttarakhand 248007India Higher Institution Centre of Excellence(HICoE) Institute of Tropical Aquaculture and Fisheries(AKUATROP)Universiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Center for Transdisciplinary Research Saveetha Institute of Medical and Technical SciencesSaveetha UniversityChennai 600072India NV Western PLT Georgetown 10400PenangMalaysia Aerospace Kaitian Environmental Technology Co. Ltd.Changsha 410000China Hunan Hongsen Novel Material Technology Co. Ltd.Yiyang 413407China

Humans have relied on biomass for survival and development since the Stone Age. All aspects of human needs for materials are covered by tools, fuel, and buildings. Nowadays, metals and petroleum-based materials are widely used in highly developed industries. Unfortunately, environmental contamination and the loss of natural resources have led to the reemergence of biomass resources as efficient and sustainable energy sources. Notably, simple and direct applications can no longer meet the demand for functionalization, high performance of materials and construction materials. Therefore, it is imperative to modify biomass and combine its utilisation to produce functionalization and high performance materials. For example, construction materials with superior mechanical properties and water resistance can be produced by reinforcing fibres to facilitate crosslinking. Water-oil separation or adsorption effects of hydrogels and aerogels are determined by the porosity and lightness of biomass, biocomposite conductor is prepared by chimaeric conductive material. Here, we review the approaches that have been taken to devise an environmentally friendly yet fully recyclable and sustainable functionalised biocomposites from biomass and its potential directions for future research.

关键词： Biocomposite Renewable Sustainability Advanced functional material Pollution mitigation

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Composite hollow fiber membranes of modified zeolite y for biogas upgrading 6

Composite hollow fiber membranes of modified zeolite y for b...

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6th Thailand International Nanotechnology Conference, NanoThailand 2018

作者： Wichidit, Thakorn Faungnawakij, Kajornsak Klaysom, Chalida Center of Excellence in Particle Technology and Material Processing Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand Pathumthani12120 Thailand

Biogas production has been globally promoted due to the need for renewable energy. Membrane gas separation is one of the most potential technologies for separating impurity and inert gases from the biogas to meet the fuel standard. Membranes with high selectivity and high permeability are most desirable in membrane gas separation. This study aims to develop the composite hollow fiber membrane for CO2 separation from CO2/CH4 mixture. The synthesized composite membranes were composed of a support layer of polysulfone (PSF) and a selective layer, containing poly-block-amide (PEBAX1657) and modified zeolite Y as the filler. The effects of filler loading at 0, 5, 10, 15, and 20 on membrane properties and performance were investigated. The defect-free composite membranes were successfully obtained in all filler loadings. © 2019 Elsevier Ltd.

关键词： Carbon dioxide

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Synthesis of Ni Nanoparticles for Solar Selective Absorber by Chemical Reduction Method 6

Synthesis of Ni Nanoparticles for Solar Selective Absorber b...

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6th Thailand International Nanotechnology Conference, NanoThailand 2018

作者： Srimara, P. Chevapruk, T. Kumnorkaew, P. Muangnapoh, T. Vas-Umnuay, P. Centre of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand Department of Materials Engineering Faculty of Engineering Kasetsart University Bangkok10900 Thailand Pathumthani12120 Thailand

Nowadays nanostructured materials have become widely used in applications of concentrating solar power (CSP) system. Solar absorber, one of the most important layers in a multilayer solar selective coating, is used to convert solar energy into heat due to its selective properties. Recently, Ni nanoparticle solar absorbers have attracted considerable attention because they offer maximized absorption and minimized thermal radiation loss. However, only few detailed investigations on the effects of morphology and structure of Ni nanoparticle on the selective absorber properties have been reported. Therefore, in this work we synthesized Ni nanoparticles via a chemical reduction method. The rapid convective deposition was used to fabricate Ni nanoparticle-Al2O3 cermet thin film as the solar selective absorber. The various ratios of [NaOH]/[NiCl2] ranging from 4-20 was investigated in order to study the effects on the morphology of Ni nanoparticles. Characterization of the morphology and structure of Ni nanoparticles and cermet thin film was performed using scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. Emissometer was used to measure the thermal emittance, and UV-Vis-NIR spectrophotometer was used to measure the reflectance of the film. It was found that the formation of chain-like nanostructure of Ni appeared when the molar ratio of [NaOH]/[NiCl2] was 4. Increasing molar ratios resulted in longer chain formation. However, when the molar ratio reached 20, spherical-like Ni nanoparticles were observed. Moreover, at this ratio, Ni nanoparticle-Al2O3 cermet film demonstrated a solar absorptance of 0.64 and a thermal emittance of 0.53, resulting in a solar selectivity of 1.20 which is suitable as solar selective absorbing coating applications. © 2020 Elsevier Ltd.

关键词： Solar energy

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Potential Production of Carbon Nanotubes from Liquid Aromatic Hydrocarbons Over Fe and Ni on Alumina Powder Via Catalytic Chemical Vapor Deposition

SSRN

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SSRN 2023年

作者： Chaiwat, Weerawut San, Myat Thiri Prachakittikul, Pensiri Chainarong, Kanjanaphon Sripisarn, Tanaporn Kerdnawee, Konrat Suttiponparnit, Komkrit Charinpanitkul, Tawatchai Koo-Amornpattana, Wanida Srifa, Atthapon Ratchahat, Sakhon Department of Chemical Engineering Faculty of Engineering Mahidol University Nakhon Pathom73170 Thailand Division of Environmental Engineering and Disaster Management Mahidol University Kanchanaburi Campus Kanchanaburi71150 Thailand Environmental Research Technology Department Innovation Institute PTT Public Company Limited Wang Noi Ayutthaya13170 Thailand Center of Excellence on Particle Technology and Material Processing Faculty of Engineering Chulalongkorn University Pathumwan Bangkok10330 Thailand

In this study, liquid aromatic hydrocarbons of benzene, toluene, and xylene (BTX), which can be abundantly found in industrial waste oil and from pyrolysis of waste plastics, were used as carbon sources to produce carbon nanotubes (CNTs). CNTs were firstly synthesized from liquid benzene over powdered alumina (Al2O3) supported Fe and Ni catalysts at 700 to 850 °C via catalytic chemical vapor deposition (CCVD) method. It was found that, CNTs synthesized from Fe/Al2O3 resulted in significantly higher carbon yields at 1.0–5.6 wt% with relatively higher graphitization analyzed by Raman spectroscopy compared to those of Ni/Al2O3 with the yields only at 0.6–2.8 wt%. However, smaller sizes of CNTs at 20–29 nm could be produced from Ni/Al2O3 compared to 30–38 nm obtained from Fe/Al2O3 due to its smaller crystallite size of the initial catalyst confirmed by X-ray diffraction (XRD) analysis. For both catalysts, with increasing CCVD temperature, the yields tended to increase with a slight increase in CNT diameter and graphitization degree. The temperature of 800 °C was then chosen for further preliminary investigation on potential mass production of CNTs from BTX. By doubling the amount of catalysts from 1 g to 2 g, the CNT yield could be approximately twice achieved by maintaining its uniformity and quality because of remaining active sites of the catalysts. In addition, increasing the carbon atoms of aromatic hydrocarbons resulted in improved yields without changing the quality of CNTs. In brief, uniform CNTs with different ranges of quality in terms of size and graphitization using Fe or Ni catalysts on alumina powder can be potentially produced from mixture of liquid aromatic hydrocarbons such as BTX in a large-scale production. © 2023, The Authors. All rights reserved.

关键词： Toluene

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Surface Modified Zif-8 Nanocomposite Pervaporation Membrane for Efficient Furfural Recovery

SSRN

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SSRN 2022年

作者： Tonthanasutthivong, Chavakorn Faungnawakij, Kajornsak Surananthsatian, Apiwat Tung, Kuo-Lun Klaysom, Chalida Center of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Chulalongkorn University Bangkok10330 Thailand 111 Thailand Science Park Phaholyothin Road Klong Laung Pathumthani12120 Thailand Department of Chemical Engineering National Taiwan University Taipei106 Taiwan Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok Thailand

Zeolitic imidazolate frameworks (ZIF-8) were incorporated into polydimethylsiloxane (PDMS), making a mixed matrix pervaporation membrane for furfural recovery. Effects of filler loading on morphology, properties, and separation performance of the membrane were investigated. ZIF-8 could disperse well in the polymer matrix and also increase the hydrophobic nature and furfural sorption ability of the membranes. The furfural permeability thus increased as the particle loading increased. Moreover, the surface modification of ZIF-8 (SM-ZIF-8) by a silane functional group could further enhance the furfural-affinity which preferably promoted the furfural transportation across the membrane. Furfural permeability of the membranes was improved by around 270% and 550% when ZIF-8 and the silane-modified ZIF-8 were incorporated, respectively. The furfural separation factor was also enhanced by 2-2.5 times. The best membrane performance was achieved when adding 15 wt.% of SM-ZIF-8, offering the furfural permeability of 37.14x105 barrer, separation factor of 26.84, and 10 times furfural product concentration. The separation mechanism of the prepared membranes was dominated by the sorption selectivity control which could be easily manipulated by incorporating a suitable filler. This study showcased the potential of furfural recovery by pervaporation when a promising furfural selective membrane is developed. © 2022, The Authors. All rights reserved.

关键词： Recovery

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Composite hollow fiber membranes of modified zeolite Y for biogas upgrading

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materials Today: Proceedings 2020年 23卷 738-744页

作者： Thakorn Wichidit Kajornsak Faungnawakij Chalida Klaysom Center of Excellence in Particle Technology and Material Processing Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) Pathumthani 12120 Thailand

Biogas production has been globally promoted due to the need for renewable energy. Membrane gas separation is one of the most potential technologies for separating impurity and inert gases from the biogas to meet the fuel standard. Membranes with high selectivity and high permeability are most desirable in membrane gas separation. This study aims to develop the composite hollow fiber membrane for CO 2 separation from CO 2 /CH 4 mixture. The synthesized composite membranes were composed of a support layer of polysulfone (PSF) and a selective layer, containing poly-block-amide (PEBAX1657) and modified zeolite Y as the filler. The effects of filler loading at 0, 5, 10, 15, and 20 on membrane properties and performance were investigated. The defect-free composite membranes were successfully obtained in all filler loadings.

关键词： PEBAX Polyether block amide Zeolite Y CO 2 /CH 4 separation Hollow fiber membrane

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Effect of pyrolysis temperature on characteristics of tunable magnetic biochar synthesized from watermelon rind and its tetracycline adsorption performance

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Journal of the Taiwan Institute of Chemical Engineers 2024年 160卷

作者： Thairattananon, Phisit Le, Giang T.T. Matsumura, Yukihiko Wu, Kevin C.W. Charinpanitkul, Tawatchai Department of Chemical Engineering Faculty of Engineering Center of Excellence in Particle and Material Processing Technology Chulalongkorn University Bangkok10330 Thailand Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh700000 Viet Nam Faculty of Environmental and Chemical Engineering Duy Tan University Da Nang550000 Viet Nam Mechanical Engineering Program Graduate School of Advanced Science and Engineering Kagamiyama Hiroshima Higashi-Hiroshima739-8527 Japan Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taoyuan Taiwan Research Network of NANOTEC-KU on Nanocatalyst and Nanomaterials for Sustainable Energy and Environment Bangkok10900 Thailand

Background: Tetracycline is an emerging contaminant in water reservoirs, causing undesirable influences on human society. The promising usage of magnetic biochar (MBC) derived from watermelon rind has been explored in the adsorption of various contaminants owing to its high specific surface area and separability;however, the temperature-dependent changes of MBC and its sorption ability toward antibiotics have not been widely examined. Method: Tunable MBCs could be synthesized via simple pyrolysis of watermelon rind impregnated with FeCl3 at different temperatures (700–900 °C). The as-synthesized MBCs were characterized using scanning electron microscopy (SEM), an elemental analyzer, N2 adsorption/desorption, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffractometry (XRD), and vibrating sample magnetometry (VSM). Then Tetracycline, an emerging contaminant in water reservoirs, was employed as the target contaminant, while adsorption kinetics, isotherm, the effect of pH, and reusability were investigated. Significant findings: The tunability of as-synthesized MBCs could be observed by their distinct changes in structural characteristics when varying pyrolysis temperature. MBC synthesized at 900 °C (MBC900) possessed a high-specific surface area (401 m2.g−1) and saturation magnetization (55.29 emu.g−1), resulting in a greater amount of sorption sites. Tetracycline adsorption by MBCs followed a pseudo-second-order kinetic model and fitted well with the Freundlich model. MBC900 is an excellent adsorbent with a maximum adsorption capacity of 77.6 mg.g−1 and could be used for at least five cycles with an insignificant decrease in the adsorption capacity. © 2024 Taiwan Institute of Chemical Engineers

关键词： Adsorption

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Synthesis of Ni Nanoparticles for Solar Selective Absorber by Chemical Reduction Method

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materials Today: Proceedings 2020年 23卷 720-725页

作者： P. Srimara T. Chevapruk P. Kumnorkaew T. Muangnapoh P. Vas-Umnuay Centre of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand Department of Materials Engineering Faculty of Engineering Kasetsart University Bangkok 10900 Thailand National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) Pathumthani 12120 Thailand

Nowadays nanostructured materials have become widely used in applications of concentrating solar power (CSP) system. Solar absorber, one of the most important layers in a multilayer solar selective coating, is used to convert solar energy into heat due to its selective properties. Recently, Ni nanoparticle solar absorbers have attracted considerable attention because they offer maximized absorption and minimized thermal radiation loss. However, only few detailed investigations on the effects of morphology and structure of Ni nanoparticle on the selective absorber properties have been reported. Therefore, in this work we synthesized Ni nanoparticles via a chemical reduction method. The rapid convective deposition was used to fabricate Ni nanoparticle-Al 2 O 3 cermet thin film as the solar selective absorber. The various ratios of [NaOH]/[NiCl 2 ] ranging from 4-20 was investigated in order to study the effects on the morphology of Ni nanoparticles. Characterization of the morphology and structure of Ni nanoparticles and cermet thin film was performed using scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. Emissometer was used to measure the thermal emittance, and UV-Vis-NIR spectrophotometer was used to measure the reflectance of the film. It was found that the formation of chain-like nanostructure of Ni appeared when the molar ratio of [NaOH]/[NiCl 2 ] was 4. Increasing molar ratios resulted in longer chain formation. However, when the molar ratio reached 20, spherical-like Ni nanoparticles were observed. Moreover, at this ratio, Ni nanoparticle-Al 2 O 3 cermet film demonstrated a solar absorptance of 0.64 and a thermal emittance of 0.53, resulting in a solar selectivity of 1.20 which is suitable as solar selective absorbing coating applications.

关键词： Solar selective absorber Convective deposition Cermet Ni nanoparticle-Al 2 O 3

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